Crossword Genius

Hard to endure (6)

Ross

There are a few possibilities for this:

'hard to endure' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for trying that I've seen before include "Essaying" , "occupation of Oliver Wendell Holmes Jnr" , "Upsetting" , "Testing" , "Making attempts" .)

I've seen this clue in the Sydney Morning Herald, The Telegraph, The Sun, The Guardian, The Times, the L.A. Times Daily, the L.A. Times Magazine and the Universal.
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